From what I guess it was a special made by Oak Grigsby, it
is not listed in their current offerings.
New Optical Encoder for DDS
This is a New but surplus Optical
encoder for use with my DDS
The case is plastic and inside there is a slotted wheel which passes
through an optical detector. (See photo below)
There are 128 pulses per revolution (you can achieve 256 ticks per
revolution with appropriate setup)
A mounting nut and washer included.
Pushbutton switch NOT included you will have to add your own (SPST-NO)
Pricing: SOLD OUT
The Encoder has 4 pins on the back, labeled: + A B -
Connect Encoder pin "+" to +5v on the PCB
Connect Encoder pins A, B to the holes marked A.B on the PCB photo above.
Connect the encoder pin labeled "-" to ground.
Connect the pushbutton switch pins to the holes makes PB-SW and GND
You will need to connect the serial port and change some paramtertes in the micro.
(No programming is required) Refer to the RS-232 manual on This page
Change these parameters:
- Change parameter #4 to 0.001 (Step size)
- Change parameter #5 to 0.003 (3 for 128pulse, 1 for 256)
- Change parameter #6 to 0.200 (Loop delay)
- Change parameter #7 to 1.100 (Acceleration)
- Change parameter #8 to 0.000 (Debounce)
- Change parameter #9 to 0.001 (Tick Divider)
Inside of the encoder you can see the slotted disk which passes through the optial sensor.